Combined photographic camera and view finder



couINEn rHoToGnArHrc cfu/:ERA AND vIEw FINDER K Filed June `1o, 1938 Patented Feb. 20, 1940.

UNITED STATES 2,191,281 comme rno'rooaarnrc camina AND vn-:w musa I Ludwig Leitz and Wilhelm Albert, Wetzlar, Germany, assignors to Ernst Leitz, G. m. b. H.,-

Wetzlar, Germany Application June 10,

ZClaiml.

This invention relates to view finders for photographic cameras which are arranged to be attached to and detached from the camera to correspond with exchangeable objectives of different focal lengths.

The object 'of this invention is to provide improved-means for mounting the view iinder upon the camera and at the same time automatically lconnect the view ilnder with the elements within the 4camera which serve to operate the view nnder to 'compensate for parallax between the finder and the objective. In the accompanying drawing illustrating the invention Fig. 1 is a rear view of a camera and view ilnderembodying the invention with parts removed and parts in section.

Fig. 2 is a plan view of the camera and nnder The housing of the camera is provided with two bearing seats 8 and 9 adapted to receive two bearings B and 1, respectively, which are suitably carried by the view iinder housing 5 which contains a suitable view finder mechanism preferably constructed on the collimator principle but not illustrated in detail because the view finder as such is no part oi.' this invention. 'I'he nnder however-is identiiied by the housing i, the rear eye opening I6 and the iinder axis I1. 'I'he objective axis is shown at I8.l A spring Il is secured to the camera and serves to yieldingly hold the view finder in its bearings 8 and 0.

In operation, when the objective is focused,

193s, serial N0. 212,954

June 12, 1937 a recess '22 in the finder. -When the pin swings about the pivot I5, the nder will of necessity be tilted about its axis l-S 1).l

The iinder is attached to the camera by inserting the iinder from the rear and pressing down on the spring III. The pivot points 6 1 will then snap into and become seated in the bearings 8 8. A slight tilting of the nnder as it is being attached will enable the ilnder to be properly positioned with respect to and to be- ,1n come engaged by the pin I2.

We claim: l. In combination, a photographic camera including an objective, a view iinder, means for securing the view iinder to the camera comprising bearing seats on the camera facing in the same direction. bearing points on the view finder facing in the opposite direction to engage said bearing seats to attach the view iinder to the camera. a spring for maintaining said view finder points in movableseating engagement with said camera bearing seats and cooperating means on the camera and on the view nnder for tilting the view iinder about an axis passing through the said bearing seats and bearing points whereby to compensate for parallax between the view iinder and the. camera objective, said axis being perpendicular to the line connecting the optical axis ofthe tindex and being in a plane perpendicular to the camera axis. 80

2. In combination, a photographic camera including an objective. a view finder, means for detachably seeuringfthe view nnder to the camera comprising two bearing seats on the camera facing in the same direction, two bearing points 85 on the view nnder facing in the opposite direction and engaging said bearing seats to detachably attach' the view ilndervto the camera, a spring on the'eamera for maintaining said view under-,points in movable seating engagement 40 with the said bearing seats, a lever in the camera in operative engagement with the view finder to tilt the same about an axis passing through the said bearing points whereby to compensate .for parallax between the view iinder and the camera objective and means within the camera for operating said'lever in response to the focussing movements oi the camera objective, said axis being perpendicular to the line connecting the optical axis of the ilnder and being in a plane perpendicular to the camera axis. UDWIG LEI'IZ.

' ALBERT.` 

